Join Date: Jan 2003
Location: CTU/TFU(Chengdu, Sichuan, China) - MIG (Mianyang, Sichuan, China) - EWR/JFK/LGA/HPN (Great New York City Metro Area, NY, USA)
Programs: UA 1MM/AS MVP Gold/F9 Gold; Marriott Lifetime Gold; IHG Platinum; Choice Privileges Platinum
Posts: 986
Based on my previous three trips and the oncmoing one (this Friday) where I have been keeping a close eye on when EUA runs, the first attempt (for NW gold, paid discount coach ticket) made by EUA is always 12:00PM EST 4 days before departure.
For example, today at 11:55AM EST, EUA did not clear for any segments on my Friday (09/16) trip DCA-MEM-DTW-LAS; at 12:01PM EST, EUA cleared only for MEM-DTW(ITN shows P9F8); EUA cleared for DTW-LAS as of now (P4F2 is shown on ITN). I don't know the exact frequency of EUA runs after the first attempt, but it looks like hourly.